.392 Dr. A. G. Butler— .4 Revision 



surface of the secondaries, but the male dry-season form never 

 shows the conspicuous discocellular black spot which charac- 

 terizes the male of typical T. Johnsloni. 



Mr. Guy A. K. Marshall, who calls the species T. opalinus 

 and sinks it as a synonym of T. eris, says that the type is an 

 unusually large female from Delagoa Bay. Of our eight 

 females three ought to be called unusually large, four fairly 

 large, and one rather small ; but the name opalescens was 

 given to the type because it is faintly opalescent on the upper 

 surface and on the under surface of the primaries, a character 

 which 1 have since discovered to be inconstant, as also is the 

 width of the internal black bordering of the primaries, which 

 is frequently as wide again as in the type. The dry-season 

 form IS smaller than that of the wet-season, the primaries 

 comparatively shorter and broader than in T. Johnstoni, with 

 the conspicuous black discal spots below which characterize 

 the wet-season form, and with a series of scaly brown spots 

 across the under surface of the secondaries between the 

 nervures. These characters and the lack of the black disco- 

 cellular spot readily distinguish it from the dry form of the 

 southern species. 



11. TeracoJus maimuna. 



Idmais maimuna, Kirby, Proc. R. Dubl. Soc. (2) ii, p. 338 (1880) ; 

 Waterhouse, Aid Ident, Ins. ii. pi. cxliii. iigs. 1, 2 (1882-90). 



The figures of this species ai'c very poor and convey a false 

 impression of it. The range of T. maimuna appears to 

 extend on the West Coast from Senegal to Angola ; it is a 

 large form, although small examples occasionally are to be 

 found. Of our seven females, one from Angola is larger than 

 the type of T. opalescens, whilst the dry-season females are 

 quite small. 



^J'his West Coast representative of T. eris is at once recog- 

 nizable in the male sex by tiie dull smoky character of the 

 apical patch, the spots on which are small and less solid in 

 colouring than in any of the other types ; the white area on 

 the primaries is also much broader and terminated less irregu- 

 larly, the margin of the secondaries is more or less spotted at 

 the extremities of the veins. The wet-season form may 

 always be distinguished from males of T. opalescens (in 

 addition to the dullness of the apical patch) by the almost 

 total absence of orange colouring from the under surface of 

 the secondaries, whilst some examples show a discal series of 

 dusky spots across the secondaries ; the intermediate season 

 form, which we have chiefly from Senegal, has a well-defined 

 orange costal streak below and a faint trace of a saffron-yellow 



